Crystal structure especially lattice parameters in hexagonal system is difficult to be determined in conventional way. Therefore, it is necessarily to involve a computer to perform the calculation of parameters of hexagonal ...

Combination of magnetic nanoparticles such as hematite (α-Fe2O3) and magnetite (Fe3O4) was used as catalysts to degradate methylene blue in aqueous solution. Magnetic nanoparticles were obtained from the natural sands ...